/* 全局样式 */
html, body, #root {
  height: 100%;
}

body {
  margin: 0;
}

html, body, #root {
  height: 100%;
}

body {
margin: 0;
}

.w_100 {
  width: 100%;
}
.row {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  justify-content: space-between;
  width: 600px;
}

.flex {
  display: flex;
  flex-direction: row;
}
.flex_center_item {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex_row {
  flex-direction: row;
}
.flex_column {
  flex-direction: column;
}
.flex_row_reverse {
  flex-direction: row-reverse;
}
.flex_column_reverse {
  flex-direction: column-reverse;
}
.flex_wrap {
  flex-wrap: wrap;
}
.flex_nowrap {
  flex-wrap: nowrap;
}
.justify_start {
  justify-content: flex-start;
}
.justify_end {
  justify-content: flex-end;
}
.justify_between {
  justify-content: space-between;
}
.justify_center {
  justify-content: center;
}
.align_center {
  align-items: center;
}
.align_stretch {
  align-items: stretch;
}
.align_start {
  align-items: flex-start;
}
.align_end {
  align-items: flex-end;
}

.content_start {
  align-content: flex-start;
}
.content_end {
  align-content: flex-end;
}
.content_center {
  align-content: center;
}
.content_between {
  align-content: space-between;
}
.content_around {
  align-content: space-around;
}
.content_stretch {
  align-content: stretch;
}



